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行われる， 行なわれる， おこなわれる
1. to be done, to be practiced, to be practised, to take place, to be held, to be prevalent, to be in fashion, to be in vogue, to be current, to come into use
（被）举行，举办；实施、盛行、流行起来、正在流行、开始使用
に
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), for, with
5. by, from
6. as (i.e. in the role of)
7. per, in, for, a (e.g. "once a month")
8. and, in addition to
9. if, although
tbd